<template>
  <div :class="className" :style="{height:height,width:width}"></div>
</template>

<script>
import echarts from 'echarts'
import { debounce } from '@/utils'
require('echarts/theme/macarons') // echarts theme

export default {
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '100%'
    },
    autoResize: {
      type: Boolean,
      default: true
    },
  chartData: {
     type: Object
    }
 },
  data () {
    return {
      chart: null
    }
  },
  mounted () {
    this.initChart()
    if (this.autoResize) {
      this.__resizeHanlder = debounce(() => {
        if (this.chart) {
          this.chart.resize()
        }
      }, 100)
      window.addEventListener('resize', this.__resizeHanlder)
    }

    // 监听侧边栏的变化
    const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
    sidebarElm.addEventListener('transitionend', this.__resizeHanlder)
  
  },
  beforeDestroy () {
    if (!this.chart) {
      return
    }
    if (this.autoResize) {
      window.removeEventListener('resize', this.__resizeHanlder)
    }

    const sidebarElm = document.getElementsByClassName('sidebar-container')[0]
    sidebarElm.removeEventListener('transitionend', this.__resizeHanlder)

    this.chart.dispose()
    this.chart = null
  },
  watch: {
    chartData: {
      deep: true,
      handler (val) {
        this.setOptions(val)
      }
    }
  },
  methods: {
    setOptions ({Line1,Line2,Line3,Line4,Line5 } = {}) {
      this.chart.setOption({
        color: ['#80FFA5', '#00DDFF', '#37A2FF', '#FF0087', '#FFBF00'],
        title: {
          text: '乐酷刷题'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#6a7985'
            }
          }
        },
        legend: {
          data: ['Line1', 'Line2', 'Line3', 'Line4', 'Line5']
        },
        toolbox: {
          feature: {
            saveAsImage: {}
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            type: 'category',
            boundaryGap: false,
            data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ],
        series: [
          {
            name: 'Line 1',
            type: 'line',
            stack: 'Total',
            smooth: true,
            lineStyle: {
              width: 0
            },
            showSymbol: false,
            areaStyle: {
              opacity: 0.8,
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {
                  offset: 0,
                  color: 'rgb(128, 255, 165)'
                },
                {
                  offset: 1,
                  color: 'rgb(1, 191, 236)'
                }
              ])
            },
            emphasis: {
              focus: 'series'
            },
            data:Line2
          },
          {
            name: 'Line2',
            type: 'line',
            stack: 'Total',
            smooth: true,
            lineStyle: {
              width: 0
            },
            showSymbol: false,
            areaStyle: {
              opacity: 0.8,
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {
                  offset: 0,
                  color: 'rgb(0, 221, 255)'
                },
                {
                  offset: 1,
                  color: 'rgb(77, 119, 255)'
                }
              ])
            },
            emphasis: {
              focus: 'series'
            },
            data:Line3
          },
          {
            name: 'Line3',
            type: 'line',
            stack: 'Total',
            smooth: true,
            lineStyle: {
              width: 0
            },
            showSymbol: false,
            areaStyle: {
              opacity: 0.8,
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {
                  offset: 0,
                  color: 'rgb(55, 162, 255)'
                },
                {
                  offset: 1,
                  color: 'rgb(116, 21, 219)'
                }
              ])
            },
            emphasis: {
              focus: 'series'
            },
            data:Line3
          },
          {
            name: 'Line4',
            type: 'line',
            stack: 'Total',
            smooth: true,
            lineStyle: {
              width: 0
            },
            showSymbol: false,
            areaStyle: {
              opacity: 0.8,
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {
                  offset: 0,
                  color: 'rgb(255, 0, 135)'
                },
                {
                  offset: 1,
                  color: 'rgb(135, 0, 157)'
                }
              ])
            },
            emphasis: {
              focus: 'series'
            },
            data: Line4
          },
          {
            name: 'Line5',
            type: 'line',
            stack: 'Total',
            smooth: true,
            lineStyle: {
              width: 0
            },
            showSymbol: false,
            label: {
              show: true,
              position: 'top'
            },
            areaStyle: {
              opacity: 0.8,
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                {
                  offset: 0,
                  color: 'rgb(255, 191, 0)'
                },
                {
                  offset: 1,
                  color: 'rgb(224, 62, 76)'
                }
              ])
            },
            emphasis: {
              focus: 'series'
            },
            data: Line5
          }
        ]
      })
    },
    initChart () {
      this.chart = echarts.init(this.$el, 'macarons')
      this.setOptions(this.chartData)
    }
  }
}
</script>
